Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1996-06-10
1998-05-05
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349 92, G02F 11333
Patent
active
057482721
ABSTRACT:
A polymer dispersed liquid crystal optical device is presented which has optical elements which control reflection, transmission and diffraction of incident light entering the device by adjusting the magnitude of the electrical field applied to the device between a maximum and a minimum limits. An optical element consists of a polymer material having an electrical field-independent refractive index, and a liquid crystal material having an electrical field-dependent refractive index. The optical elements are distributed through the device at specific inter-element spacings, thus enabling to generate reflection of incident light in accordance with Bragg's law of reflection. The inter-element spacings can also be varied by the application of the field, thus enabling to generate reflection of light of a desired wavelength. Such optical elements are ideal for use in full color optical display apparatus of a matrix driven type. Methods for producing the optical device and optical display apparatus are also presented.
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Kato Kinya
Sakai Shigenobu
Tanaka Keiji
Tsuru Shinji
Nguyen Tiep H.
Nippon Telegraph and Telephone Corporation
Sikes William L.
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